I'm relocating a bathroom and need to sort out venting.
In an ideal world, I wouldn't put another stack through the roof. It's a vaulted ceiling and the walls don't go all the way up, so if I put in a small 2" vent for the new bath (straight up from the sink in the new bath) a few feet will be visible between the top of the wall and the ceiling. Not ideal.
I could run an AAV vent (cheater vent) but a) that's not kosher to code up here I don't think and b) I'd rather not have the risk of the seal failing.
So - the puzzle is can I somehow use the existing stack as shown in the diagram to vent the new bath which is 15 feet away?
Nothing is really vented well. The bath fixtures all just tie into the drain, and presumably are close enough to the stack to vent reasonably well. All the drains seem to work OK. The kitchen sink is not vented at all, but again it drains (I think being a double bowl sink helps with that).
The cottage is up on piers - 3 to 4 feet over the ground with an enclosed crawlspace where the drains are. It exits the back corner and drops into a septic tank / drain field.
So I have room to play under there. I thought maybe I could run a vent pipe in the crawl space sloped up towards the main stack, come up through the floor in the closet and tie into the stack higher up.
But of course this doesn't put the 'air behind water' very well. Thoughts?
In an ideal world, I wouldn't put another stack through the roof. It's a vaulted ceiling and the walls don't go all the way up, so if I put in a small 2" vent for the new bath (straight up from the sink in the new bath) a few feet will be visible between the top of the wall and the ceiling. Not ideal.
I could run an AAV vent (cheater vent) but a) that's not kosher to code up here I don't think and b) I'd rather not have the risk of the seal failing.
So - the puzzle is can I somehow use the existing stack as shown in the diagram to vent the new bath which is 15 feet away?
Nothing is really vented well. The bath fixtures all just tie into the drain, and presumably are close enough to the stack to vent reasonably well. All the drains seem to work OK. The kitchen sink is not vented at all, but again it drains (I think being a double bowl sink helps with that).
The cottage is up on piers - 3 to 4 feet over the ground with an enclosed crawlspace where the drains are. It exits the back corner and drops into a septic tank / drain field.
So I have room to play under there. I thought maybe I could run a vent pipe in the crawl space sloped up towards the main stack, come up through the floor in the closet and tie into the stack higher up.
But of course this doesn't put the 'air behind water' very well. Thoughts?